package book;

/**
 * @Author 12629
 * @Description：
 */
public class BookList {

    private Book[] books = new Book[10];
    //表示当前书架上书的有效个数
    private int usedSize;
    /**
     * 当调用该构造方法的时候，书架上 预先存放3本书
     */
    public BookList() {
        books[0] = new Book("三国演义","罗贯中",10,"小说");
        books[1] = new Book("西游记","吴承恩",15,"小说");
        books[2] = new Book("红楼梦","曹雪芹",5,"小说");
        usedSize = 3;
    }

    /**
     * 获取某个下标的书
     * @param pos
     * @return
     */
    public Book getBook(int pos) {
        if(pos < 0) {
            return null;
        }
        return books[pos];
    }

    public void setBook(int pos,Book book) {
        books[pos] = book;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }
}
